A disadvantage of using a trap antenna?

A disadvantage of using a trap antenna?


"It will radiate harmonics"

The difference between the RF carrier and the modulating signal frequencies is called the____

The difference between the RF carrier and the modulating signal frequencies is called the____

"LSB"

Which of the following can be done by a smart modem?

Which of the following can be done by a smart modem?

"Accepts commands from the terminal via the RS-232 interface"

When the signal from a mobile cellular unit drops below a certain level, what action occurs?

When the signal from a mobile cellular unit drops below a certain level, what action occurs?

"The unit is "handed off" to a closer cell"

Harmonic suppressor connected to an antenna...

Harmonic suppressor connected to an antenna...

"Low-pass filter"

it is possible to increase the maximum range of a radar equipment by:

it is possible to increase the maximum range of a radar equipment by:

"all of the above"

Decree created the Professional Regulations Communications (PRC)..

Decree created the Professional Regulations Communications (PRC)..


"P.D. 223"

Which of the following is not used for communications?

Which of the following is not used for communications?

"x -rays"

What are the primary cause of ionization in the atmosphere?

What are the primary cause of ionization in the atmosphere?

"Ultraviolet Radiation"

Collects very weak signals from a broadcast satellite.

Collects very weak  signals from a broadcast satellite.

"satellite dish"

A shunt-fed quarter-wavelentgh Marconi anetenna?

A shunt-fed quarter-wavelentgh Marconi anetenna?

"has zero DC  resistance to ground"

ADF stands for?

ADF stands for?

"Automatic Direction Finder"